Thanks for the comments guys
Will, if you're after an aerial to improve reception, I can't recommend the short carbon one. When I first fitted it, I could only really get Radio 1. However, after removing the centre console (and HU) to carbon wrap it, I had to re-tune the radio and it seems much better now! I've got a lot more stations.
It's worth a try for less than a tenner though mate. Certainly looks cool